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27 Jan 2025 14:36:34 -0800 X-CSE-ConnectionGUID: 0fI+5KI1S8OTpuVh/ZBmCw== X-CSE-MsgGUID: mntkRNPSQui/N7mL7GmQtQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,239,1732608000"; d="scan'208";a="113601933" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.39.141]) by orviesa004.jf.intel.com with ESMTP; 27 Jan 2025 14:36:33 -0800 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, igt-dev@lists.freedesktop.org Cc: Vinay Belgaumkar , Lucas De Marchi , Riana Tauro , Rodrigo Vivi Subject: [PATCH i-g-t v6 2/2] tests/xe/pmu: Add pmu tests Date: Mon, 27 Jan 2025 14:33:01 -0800 Message-Id: <20250127223301.2819108-3-vinay.belgaumkar@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20250127223301.2819108-1-vinay.belgaumkar@intel.com> References: <20250127223301.2819108-1-vinay.belgaumkar@intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Simple tests for validating the PMU implementation for GT C6 residencies. v2: Rename rc6-residency-* to gt-c6-residency and remove freq tests. v3: Keep just gt-c6 tests, add frequency tests later. v4: Review comments (Riana) Cc: Lucas De Marchi Cc: Riana Tauro Cc: Rodrigo Vivi Signed-off-by: Vinay Belgaumkar --- tests/intel/xe_pmu.c | 176 +++++++++++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 2 files changed, 177 insertions(+) create mode 100644 tests/intel/xe_pmu.c diff --git a/tests/intel/xe_pmu.c b/tests/intel/xe_pmu.c new file mode 100644 index 000000000..61a7a7e38 --- /dev/null +++ b/tests/intel/xe_pmu.c @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2025 Intel Corporation + */ + +/** + * TEST: Test Xe PMU functionality + * Category: Perf Monitoring Unit + * Mega feature: Perf Monitoring Unit + * Sub-category: Power Management + * Functionality: Power/Perf + * Test category: Functional tests + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "igt.h" +#include "igt_device.h" +#include "igt_power.h" +#include "igt_sysfs.h" +#include "igt_perf.h" + +#include "lib/igt_syncobj.h" +#include "xe/xe_ioctl.h" +#include "xe/xe_gt.h" +#include "xe/xe_query.h" +#include "xe/xe_spin.h" +#include "xe/xe_util.h" + +#define SLEEP_DURATION 2 /* in seconds */ +const double tolerance = 0.1; +const unsigned long batch_duration_ns = 500e6; +const char *no_debug_data = "\0"; + +#define __assert_within_epsilon(x, ref, tol_up, tol_down, debug_data) \ + igt_assert_f((double)(x) <= (1.0 + (tol_up)) * (double)(ref) && \ + (double)(x) >= (1.0 - (tol_down)) * (double)(ref), \ + "'%s' != '%s' (%f not within +%.1f%%/-%.1f%% tolerance of %f)\n%s\n",\ + #x, #ref, (double)(x), \ + (tol_up) * 100.0, (tol_down) * 100.0, \ + (double)(ref), debug_data) + +#define assert_within_epsilon(x, ref, tolerance) \ + __assert_within_epsilon(x, ref, tolerance, tolerance, no_debug_data) + +static int open_pmu(int xe, uint64_t config) +{ + int fd; + + fd = perf_xe_open(xe, config); + igt_skip_on(fd < 0 && errno == ENODEV); + igt_assert(fd >= 0); + + return fd; +} + +static uint64_t __pmu_read_single(int fd, uint64_t *ts) +{ + uint64_t data[2]; + + igt_assert_eq(read(fd, data, sizeof(data)), sizeof(data)); + if (ts) + *ts = data[1]; + + return data[0]; +} + +/** + * SUBTEST: gt-c6 + * Description: Basic residency test to validate idle residency + * measured over a time interval is within the tolerance + */ +static unsigned int measured_usleep(unsigned int usec) +{ + struct timespec ts = { }; + unsigned int slept; + + slept = igt_nsec_elapsed(&ts); + igt_assert(slept == 0); + do { + usleep(usec - slept); + slept = igt_nsec_elapsed(&ts) / 1000; + } while (slept < usec); + + return igt_nsec_elapsed(&ts) / 1000; +} + +static unsigned long read_idle_residency(int fd, int gt) +{ + unsigned long residency = 0; + int gt_fd; + + gt_fd = xe_sysfs_gt_open(fd, gt); + igt_assert(gt_fd >= 0); + igt_assert(igt_sysfs_scanf(gt_fd, "gtidle/idle_residency_ms", "%lu", &residency) == 1); + close(gt_fd); + + return residency; +} + +static u64 get_event_config(int xe, unsigned int gt, char *event) +{ + int ret; + char xe_device[100]; + u64 pmu_config; + u32 start, end; + + xe_perf_device(xe, xe_device, sizeof(xe_device)); + ret = perf_event_config(xe_device, event, &pmu_config); + igt_assert(ret >= 0); + ret = perf_event_format(xe_device, "gt", &start, &end); + igt_assert(ret >= 0); + pmu_config |= (u64) gt << start; + + return pmu_config; +} + +static void test_gt_c6(int xe, unsigned int gt) +{ + int pmu_fd; + u64 pmu_config; + char event[100]; + uint64_t ts[2]; + unsigned long slept, start, end; + uint64_t val; + + /* Get the PMU config for the gt-c6 event */ + sprintf(event, "gt-c6-residency"); + pmu_config = get_event_config(xe, gt, event); + + pmu_fd = open_pmu(xe, pmu_config); + + igt_require_f(igt_wait(xe_gt_is_in_c6(xe, gt), 1000, 10), "GT %d should be in C6\n", gt); + + /* While idle check full RC6. */ + start = read_idle_residency(xe, gt); + val = __pmu_read_single(pmu_fd, &ts[0]); + slept = measured_usleep(SLEEP_DURATION * USEC_PER_SEC) / 1000; + end = read_idle_residency(xe, gt); + val = __pmu_read_single(pmu_fd, &ts[1]) - val; + + igt_debug("gt%u: slept=%lu, perf=%"PRIu64"\n", + gt, slept, val); + + igt_debug("Start res: %lu, end_res: %lu", start, end); + + assert_within_epsilon(val, + (ts[1] - ts[0])/USEC_PER_SEC, + tolerance); + close(pmu_fd); +} + +igt_main +{ + int fd, gt; + + igt_fixture { + fd = drm_open_driver(DRIVER_XE); + igt_require(!IS_PONTEVECCHIO(xe_dev_id(fd))); + } + + igt_describe("Validate PMU gt-c6 residency counters"); + igt_subtest("gt-c6") + xe_for_each_gt(fd, gt) + test_gt_c6(fd, gt); + + igt_fixture { + close(fd); + } +} diff --git a/tests/meson.build b/tests/meson.build index 33dffad31..d20f50766 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -309,6 +309,7 @@ intel_xe_progs = [ 'xe_pat', 'xe_peer2peer', 'xe_pm', + 'xe_pmu', 'xe_pm_residency', 'xe_prime_self_import', 'xe_query',